<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>项目属性排序 增长 收缩</title>
    <style>
        .box {
            background-color: yellow;
            display: flex;
        }
        .box>div , .example {
            width: 200px;
            height: 200px;
            border: 2px solid red;
            font-size: 30px;
        }
        /* 01 项目排序 */
        .item3 {
            order: -1; /*数字越小越靠前*/
        }
        .item1 {
            order: 0; /*默认是0*/
        }
        .item2 {
            order: 1; /*数字越大越靠后*/
        }
    </style>
</head>
<body>
<div class="example">参考大小200px</div>
<div class="box">
    <div class="item1">01</div>
    <div class="item2">02</div>
    <div class="item3">03</div>
    <div class="item4">04</div>
    <div class="item5">05</div>
    <div class="item6">06</div>
</div>
</body>
</html>